create(['name' => 'Sub Test']); expect($sub->name)->toBe('Sub Test'); expect($sub->classification)->toBeInstanceOf(Classification::class); }); test('sub classification belongs to a classification', function () { $parent = Classification::factory()->create(); $sub = SubClassification::factory()->create(['classification_id' => $parent->id]); expect($sub->classification->id)->toBe($parent->id); }); test('classification has many sub classifications relationship works', function () { $parent = Classification::factory()->create(); SubClassification::factory()->count(3)->create(['classification_id' => $parent->id]); expect($parent->subClassifications)->toHaveCount(3); });